To get this achievement you need to "craft" 25 items. To get to the crafting menu hold
to open your weapon-wheel and press
to go to the utility-wheel. From here everything you craft counts toward the achievement.
You can also craft bombs in the bottom part of your weapon-wheel, this will also count towards the achievement.
While I was scavaging places I got a lot of Liquor, which you can use to craft 'Liquor'. Once you have made ten liquors, drink them all and you can craft them again. The best places to get items to use for crafting are outposts.